osi: add definitions for ACIA dividers, set serial divider to /16

ivop · Sep 6, 2024 · 24cb780 · 24cb780
1 parent ca41070
commit 24cb780
Show file tree

Hide file tree

Showing 2 changed files with 5 additions and 1 deletion.
diff --git a/src/arch/osi/floppy.S b/src/arch/osi/floppy.S
@@ -61,6 +61,10 @@ STATUS_PE_MASK   = 0x40             ; Rx Parity Error
 STATUS_IRQ_MASK  = 0x80             ; /IRQ, if pin output is low, bit is 1
                                     ; clear by read of RDR
 
+CONTROL_DIV_1  = 0
+CONTROL_DIV_16 = 1
+CONTROL_DIV_64 = 2
+
 WS_SHIFT = 2
 
 WS_7E2 = 0x00

diff --git a/src/arch/osi/serial.S b/src/arch/osi/serial.S
@@ -13,7 +13,7 @@ SERIAL_ACIA_TDR     = $fc01
 zproc init_serial
     lda #CONTROL_RESET
     sta SERIAL_ACIA_CONTROL
-    lda #(TCB_nRTS_HIGH_IRQ_DIS << TCB_SHIFT) | (WS_8N2 << WS_SHIFT)
+    lda #(TCB_nRTS_HIGH_IRQ_DIS << TCB_SHIFT) | (WS_8N2 << WS_SHIFT) | CONTROL_DIV_16
     sta SERIAL_ACIA_CONTROL
     rts
 zendproc